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UNrraD STATES FATENT Oratori.

JOHN N. CLARKE, OF CINCINNATI, OHIO, ASSIGNOR OF TWO-THIRDS TO SAMUEL T. J. COLEMAN AND EDMUND B. REYNOLDS, BOTH OF SAME FLAC E.

HORSESHOE-BLANK ROLL.

SPECIFICATION forming part of Letters Patent No. 275,022, dated April 3, 1883,

Application filed November 6, 15E-2. (No model.)

To all whom it may concern Be it known that I, JoHN N. CLARKE, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Horseshoe-Blank Rolls, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention comprises a special construction of roll, wherein the peculiar form of horseshoe-blank bar seen in Letters Patent No. 260,454, granted to me. July 4, 1882, can

'be manufactured in the most rapid, economical, and uniform manner, the arrangement of the dies in said roll being hereinafter more fully described, and pointed out in the claim.

In the annexed drawings, Figure lis a front elevation of a pair of rolls employed for imparting the preliminary shape to the blank 0r bar. Fig. 2 is an enlarged transverse section of a bar after being run through the first pass 7 of said rolls. Fig. 3 is a similar sec tion of the bar after having traversed the second pass. Fig. 4 is an enlarged' vertical section of the finishing-roll, a bar heilig shown in the act of passing through the same. Fig. 5 is a similar section of a modification of said tinishing-roll. Fig. 6 is a modifica-tion of one of the passes in the forming-rolls. Fig. 7 is a transverse section of a bar produced by such a modification of the forming-rolls.

Referring to Fig. 1, A A represeutvhousings or standards that afford journal-bearings for a pair of forming-rolls, B C, said rolls having passes D E, capable respectively7 ot' imparting to lthe blank or har substantially the different shapes seen in Figs. 2 and 3. These shapes, however, are only approximate, and may be varied considerably, according to the size and weight of shoe and the material of which it is composed, the object of said passes D E being to gradually reduce the rough blank or bar to a convenient form previous to being run through the finishing-roll F. (Seen in Fig. 4.) Reference to this illustration will show that two diametrically-opposite dies, Gr Gr', extend some distance around the periphery of said roll, which dies produce the comparatively long marginal projections seen in my patent herein referred to. Located' at equal distances from the long die Cr, but on opposite sides of the roll, are two relatively shorter dies, H I, supplemented by a similar pair, H I', which dies H H. I I produce the smaller marginal projections seen in said patent, it being understood that this roll F is arranged to form two precisely similar blanks at every revolution. Said roll may, however, be arranged to turn out three or more blanks at every revolution, it desired. After the rough bar has been properly heated it is tirst run through the pass D, and is thereby re duced to the shape seen in 2. Said bar is then inverted and caused to traverse the second pass, E, from which it emerges in the shape shown in Fig. 3. This reduced bi1-r s now run through the iinishingroll F, as indicated by the arrowin Fig. 4, and, assuming that the dies I I are the iirst to operate on said bar, it is evident they form thereon a pair of short calks, K K, which correspond with the projections C C. (Seen in my patent previously alluded to.) Furthermore, itis apparent that the extended die G will form on said bar a calli, L, corresponding to the long projection B, (seen in said patent,) while the continued revolution ofsaid roll will cause the other dies, H H and G', to act successively on the bar in the manner just described; hence itis evident that every complete revolution ofroll F produces two precisely similar blanks,

each ot' which consists of a long` project-ion and a pair ot' shorter calks,whichblank can then be cut transversely, so as to afford the two different forms of shoes seen in my patent referred to. The iinishing-roll F may be modified in its construction, as seen in Fig. 5, where a somewhat shorter die, G, is used instead ofthe die G. Again, the dies H I" are not only shorter than the corresponding dies, H I', (seen in Fig. 4,) but are located comparatively near the die G, while the dies H I are somewhat remote from the die G. Consequently that portion of the roll including the set of dies I G H will produce a longer blank than will the same dies seen in Fig. 4; but the other set of dies, H G I, will turn CO u out a shorter blank than the dies H G I. It therefore follows that every complete revolution of the roll F (seen in Fig. 5) will produce one long blank and another shorter one.

The rolls above described are used for manufacturing blanks having truncated ridges or projections; but when it is desired to furnish sharp ridges, so as to ai'ord a bar capable of being made up into winter shoes, the rolls B C should have a pass approximating what is shown at M in Fig. 6. This pass willproduce a blank having the transverse section seen at J in Fig. 7.

I claim as my invention-- The roll F for finishing horseshoe blanks or JOI-IN N. CLARKE.

Witnesses:

JAMES H. LAYMAN, .ANKiN D. JONES. 

